nodetool inmemorystatus

Returns a list of the in-memory tables and the amount of memory each table is using.

Returns a list of the in-memory tables and the amount of memory each table is using. See .

Synopsis

nodetool [connection_options] inmemorystatus
[--] [keyspace_name table_name [table_name ...]]
Table 1. Legend
Syntax conventions Description
UPPERCASE Literal keyword.
Lowercase Not literal.
Italics Variable value. Replace with a valid option or user-defined value.
[ ] Optional. Square brackets ( [ ] ) surround optional command arguments. Do not type the square brackets.
( ) Group. Parentheses ( ( ) ) identify a group to choose from. Do not type the parentheses.
| Or. A vertical bar ( | ) separates alternative elements. Type any one of the elements. Do not type the vertical bar.
... Repeatable. An ellipsis ( ... ) indicates that you can repeat the syntax element as often as required.
'Literal string' Single quotation ( ' ) marks must surround literal strings in CQL statements. Use single quotation marks to preserve upper case.
{ key:value } Map collection. Braces ( { } ) enclose map collections or key value pairs. A colon separates the key and the value.
<datatype1,datatype2> Set, list, map, or tuple. Angle brackets ( < > ) enclose data types in a set, list, map, or tuple. Separate the data types with a comma.
cql_statement; End CQL statement. A semicolon ( ; ) terminates all CQL statements.
[ -- ] Separate the command line options from the command arguments with two hyphens ( -- ). This syntax is useful when arguments might be mistaken for command line options.
' <schema> ... </schema> ' Search CQL only: Single quotation marks ( ' ) surround an entire XML schema declaration.
@xml_entity='xml_entity_type' Search CQL only: Identify the entity and literal value to overwrite the XML element in the schema and solrconfig files.

Definition

The short form and long form parameters are comma-separated.

Connection options

-h, --host hostname
The hostname or IP address of a remote node or nodes. When omitted, the default is the local machine.
-p, --port jmx_port
The JMX port number.
-pw, --password jmxpassword
The JMX password for authenticating with secure JMX. If a password is not provided, you are prompted to enter one.
-pwf, --password-file jmx_password_filepath
The filepath to the file that stores JMX authentication credentials.
-u, --username jmx_username
The username for authenticating with secure JMX.

Command arguments

--
Separates an option from an argument that could be mistaken for a option.
keyspace_name
The keyspace name.
table_name
One or more table names, separated by a space.

Examples

Print information on all in-memory tables 

nodetool inmemorystatus
Results when there are in-memory tables:
Max Memory to Lock:                          3209MB
Current Total Memory Locked:                    260MB
Current Total Memory Not Able To Lock:          17MB
Keyspace                       ColumnFamily                           Size     Couldn't Lock   Usage
cycling                        popular_count                         260MB              17MB      8%
cycling                        birthday_list                           0MB               0MB      0%
Results when there are no in-memory tables:
Max Memory to Lock:                          3209MB
Current Total Memory Locked:                    0MB
Current Total Memory Not Able To Lock:          0MB
No MemoryOnlyStrategy tables found.

Print information on in-memory tables in the cycling keyspace and popular_count table

nodetool inmemorystatus cycling popular_count
Results when the specified table is using MemoryOnlyStrategy:
Max Memory to Lock:                          3209MB
Current Total Memory Locked:                    260MB
Current Total Memory Not Able To Lock:          17MB
Keyspace                       ColumnFamily                           Size     Couldn't Lock   Usage
cycling                        popular_count                         260MB              17MB      8%
Results when the specified table is not using MemoryOnlyStrategy:
nodetool: Keyspace cycling Table birthday_list is not using MemoryOnlyStrategy.